Will I have enough CFM to maintain temps?

Cabinet is 3 X 2 X 3 foot high. It is in a climate controlled room and will be vented to the outside. I will use a 150 watt HPS light with an in line duct fan (4inch - 40 CFM)attached to the light hood. Also using 4- 24 inch T5's for side light. Do you think it is enough ventilation to keep the heat down?

THANKS

Good lord man. You got all that juice and you are wasting it on tiny little cabinet. Is a cloning chamber or what? If it is, ditch the hps and use the t5s only, that way heat won't be an issue.

Anyway, I suppose you want an answer to your question. It should be able to vent that tiny space easy enough.

3•2•3 18cubic is ur room. Your fans 40cf per minute should be ok but you gonna have to keep an out cuz its a small space. Good luck. Get a thermonitor( dunno if spelled right) with a high and low memory if u can